Impact noise is a frequently discussed topic. Even when the standardized requirements on flooring system are fulfilled, it can happen in practice that neighbours are still disturbed, even for heavy floors. In most cases this is caused by an insufficient sound insulation at low frequencies. To understand the physics behind these phenomena, standard sound pressure measurements might not be enough. Acceleration measurements can give more information in these cases. As part of the national grant VEGA 1/0205/22, which is focused on low-frequency impact noise, the precise analysis of basic massive testing floor and its reaction on the tapping machine and standardized rubber ball excitation was investigated. The conventional measurement technique based on microphone measurement as well as vibration measurement based analysis were compared. The analysis was supported by means of a numerical model.